<template>
  <div class="container">container</div>
</template>
<script setup>
import { onBeforeMount, onMounted } from "vue";
onBeforeMount(() => {
  console.log("DOM元素渲染前", document.querySelector(".container"));
});
onMounted(() => {
  console.log("DOM元素渲染后", document.querySelector(".container"));
});
</script>
